Random Blindfold Cubing Discussion

What are most of your success rates? I notice that even the best DNF, but that's probably because they're obviously pushing themselves. My success rate is at about 90%, maybe 95%.

I've said this on the forum before, but I write again in case some haven't seen it. Think of what success rate you would like to have in a round of 2 solves, or a round of 3 solves.

For example, I like to make sure that in a competition that I have at least a 99% chance to get at least one successful solve during that round.

For a round of 2 solves:
\( 1-(1-x)^2 \geq 0.99 \)
Where x = your success rate on each individual solve* (and where \( 0 \leq x \leq 1 \))
*I assume here that you will attempt to solve with the same accuracy rate on every solve

Solving for x you get \( x \geq 0.9 \)

So make sure you solve with a 90% success rate on any individual solve (under pressure) to have a 99% chance of getting at least one solve in that round.

Similarly for a 3 solve round:
\( 1-(1-x)^3 \geq 0.99 \)

Solving for x you would get approximately \( x \geq 0.785 \)

So you must solve with a 78.5% accuracy rate on any individual solve (under pressure) to have a 99% chance of getting at least one solve in that round.

---------

Those are good goals to shoot for, but even if you solve with 50% accuracy rate you still have a 75% chance to get at least one solve in a round of 2 solves, and an 87.5% chance to get at least one solve in a round of three solves.
 
Well at home i DNF maybe 1 in 10 solves maybe, sometimes i can do 12. In school that rate drops to maybe 1/4 solves are DNF. However, i don't have a timer at school, and i do significantly better with a timer.

I believe i do better with a timer because more of my attention goes into the solve, when do BLD in school i'm just casually doing it, so i'm more likely to make mistakes because i'm just kinda... casually doing it?
 
What are most of your success rates? I notice that even the best DNF, but that's probably because they're obviously pushing themselves. My success rate is at about 90%, maybe 95%.

That's very high - are you sure? I might have thought I was at 90%, but my statistics show I'm more like 80-85% at home, and significantly worse than that in competition.

Of course, Tim Habermaas is in a class by himself here:

Rubik's Cube Blindfolded longest success streak
Person Length Best Avg Worst When?
Tim Habermaas 55 1:19.43 1:52.82 3:50.28 Nov 2009 - ongoing...

Anyway, it does appear that rushing yourself will lead to better times. Tim is plenty good enough to be averaging sub-1, but he focuses on accuracy, which is undoubtedly why he's so slow.
 
Prompted by the yet another high-profile bld cuber quitting, I have put together some of my thoughts about bld. Although the tone may turn out rather negative towards the events, I am in no way putting those who still blind solve down. I totally respect those who do and in some ways wish I had the desire for it.

In basic terms, blindfolded cubing is a very different animal to sighted events. I think the main foci of sighted events are turning speed, lookahead, alg learning and prediction. While blindfold cubing has turning speed and alg learning, memorisation speed and volume are introduced and are major aspects of the solve.

When I started cubing it was for fun. I really enjoyed the colours, the therapeutic turning, and most of all the challenge of beating my own times in a very measurable hobby. Solving a cube blindfolded was a challenge I accepted so that I could prove to myself that I could do it – I was never really addicted to getting faster at solving blindfolded in the way that I was for sighted events. This was the case for big bld too and multibld. Of course over time I improved slowly and my times got quicker, but practise was never fun enough. I shall try to explain why by breaking the solve down into its 2 components: Memorisation and Execution.

Here are 3 ways to approach the memorisation stage.
• Slow and steady. This is what you do when you just want a success to prove to yourself you can do it. Once that was done, I never practised like this because it seemed like a waste of time. It would just be going slower than I was able to and therefore gave no self-satisfaction. Improvement would also be very slow as you never stretch yourself.
• Normal pace. I imagine this is what most people would do the majority of the time. It’s a speed that requires 99% concentration and you think you will successfully memorise everything but you are pushing yourself to do it quickly. I believe this does result in improvement to both speed and recall accuracy, and I undertook most of my practise at this pace. The problem I had with it is that it was very stressful. I was constantly worried about whether I would remember everything and after each solve I was mentally drained from the 100% concentration I was trying to attain.
• Too-fast pace. This is the pace at which you think that you won’t manage to remember everything at. It’s a very risky memo that often results in massive recall fails. But for me it yielded the best results. If I felt like it was time to cut time off my average memo, I’d just memo 20 seconds faster and see what happened. More often than not I did better than I expected and that fast memo time would soon become my normal pace. I found this the most enjoyable for a number of reasons: I was proving that I could do things I didn’t think I could, the attempts were over quicker and I cut chunks off my times when it worked.

Execution was a very boring stage for me. As far as I was concerned, the hard work was done during the memorisation, and while execution required some concentration, it was just a case of getting it over and done with. A lot of the joy I get from cubing sighted is either because I don’t know what’s coming next, or I am trying to predict what will happen next. This doesn’t exist in blindfolded execution because it’s just regurgitation of memory. Think of it in terms of memory sports: Competitors might memorise lists of numbers for 5 minutes and then spend 10 minutes writing them all down. I can’t imagine the writing of the numbers is particularly interesting or enjoyable. It’s the same for me with blindfolded execution because I cannot even see the cube.

Multibld was a similar case to bigbld, except that the annoyingly boring execution stage went on even longer. What was even more annoying was carrying 20 extra cubes across Europe. I knew I could memorise 20+ cubes. I knew I could memorise 50 or 100 cubes with enough time. I had nothing to prove to myself any more.

Hopefully that has given you insight into why blindfolded cubing was simply not very enjoyable to me. Now you might ask why I did practise and reach a world-class level despite apparently not liking it! I shall explain.

Once I started going to competitions, my competitive instinct kicked in massively. It was clear to me that not only were the non-existent bigbld NRs my best bet of getting a record, my natural talents also happened to be in blindfold cubing. So I set about learning to solve a 4x4 and 5x5 blindfolded and duly got official successes. After a while, I realised that my steady improvement didn’t leave me all that far from and ER or WR, so again I practised hard with that goal in mind. Once that goal was reached, there was little else to achieve so my interest disappeared completely. Practise was not fun for the reasons I’ve detailed above, and there was nothing to aim for. So, that was the end of blindfold cubing for me. While chasing these records I lost sight of the reasons I started cubing in the first place. Quitting blind has helped me rediscover the spark again. I could compete in 4 and 5bld still, but what’s the point? I have no aim and all it does is create stress for myself during the competition. Will I return? I can’t envisage it currently, but I wouldn’t rule it out. Competitions are always the best weekends I have without fail and I don’t wish to spoil them.

Now I’ve written all that, I realise that I didn’t go much into why others quit bld as well, but maybe some of the points apply. It has certainly helped me to get my head round it and clear my thoughts :)
 
in short: Don't get too caught up in the public competition, do it cause it's fun, and try to beat your own records rather than WR?
I've found these to be true. The pressure always makes it less fun.
 
Daniel, I totally agree with what you said about execution being boring. I even get bored during 3BLD execution, so I don't think I'll ever be good at 4BLD or 5BLD. I actually don't think that rule applies to multi though since the execution may be longer, but memorization is a lot more compared to it. I think that 3BLD is still fun for me since you still have to hold everything while executing and (if you memorize fast) you are spending execution time reviewing memo. The competing side of 3BLD is a lot uglier than that of bigBLD or multi since it's all about getting that one good scramble and not choking whereas the other blind events have a higher probability of a success being a good solve. I think I would like 3BLD a LOT more if mo3 was a thing so it wasn't all about the single.
 
Interesting. For me, the memo is a little uncomfortable (although not as much for big cubes BLD, for some reason that I totally do not understand - I don't know why they're different, but they are), but execution is relaxing and therapeutic. I love doing execution on BLD. With big multis, I absolutely hate the memorization phase, but I love the execution phase (unless I have a recall failure, which always feels awful).

But I admit I don't push myself quite as hard as most of the top people do. Which might be why I'm not all that good. But it might also be why I never get tired of it.
 
I certaintly love execution and memo almost equally. Execution more, like mike said, it's relaxing and thinking ahead and not stopping to recall is a nice feeling. Granted i am a little bit more new to BLD, so that spark is a bit more prominent for me, but pulling off that blindfold and knowing that my memo and execution where spot on feels great.
 
Motivated by my 5BLD DNFs, I've started writing down a list of move/speed optimal algs for wings, centers and midges with a couple of words/images for each letter pair (I don't have a set list yet) and some comments explaining how some of the commutators work and some variations.

This along with a lot more execution practice (and a better cube) will hopefully help me memo faster and to push my execution times from 6:00 to 4:00 when relaxed and maybe even 3:00-3:30 when at full speed, once everything becomes automatic. I also hope it will be of use to new and current big cube BLD solvers. I want to be a real contender. And of course I will share when it's done!

I've also started preparing for a 6BLD solve tonight.

This project and my degree (the latter being the more important) will take a lot more of my time so I'll be taking a much less active role in the forums. Will definitely still keep in touch with some of you!
 
I am just learning to BLD. I have 4 successful solves, one of which I timed--13 mins 29.xx seconds. What steps should I take to improve my speed? Right now, the time it takes for me to memorize is really slow. I use Old Pochman method. Each edge/ corner face is associated with a letter, for which a find a word that fits into a story. Any tips are welcome.
 
I am just learning to BLD. I have 4 successful solves, one of which I timed--13 mins 29.xx seconds. What steps should I take to improve my speed? Right now, the time it takes for me to memorize is really slow. I use Old Pochman method. Each edge/ corner face is associated with a letter, for which a find a word that fits into a story. Any tips are welcome.

Practice, practice, practice... You will be sub10 minutes or even better in no time.
 
Some of Daniels thoughts about Bld :)
I like Bld, but occasionally quit cubing for long periods of time. Bld can get boring or stressfull, but it is normaly what gets me back to solving. Although I treat Bld like another way to practice mnemonics sometimes, I still like execution because I can still improve my cycles and there is more than one way to solve a case. I am nowhere near as good as you, but one day I may be and like Mike I don't really care about how long that takes. It's a very different animal, but it's still fun and rewarding.
 
Wings 3-cycle Index - DFr buffer

Completed my list of speed-optimized 3-cycles for wings.

It is written with my lettering scheme so that I could show you my letter pair images and words used for memo. There is a breakdown of my lettering scheme on both pages and there are filters so you can look up algorithms regarding specific wings.

There is also a comments section - it will usually give advice on how to work out the advanced r2 algorithm, give an alternate alg or give you a better alg which I've only thought of after writing.

There are BOUND to be mistakes, although I have checked over already. Please point them out so I can correct it quickly.
 
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